All supplies and contractual services, except as otherwise provided herein, when the estimated cost thereof shall exceed $10,000, shall be purchased by formal, written contract from the lowest responsible bidder, after due notice inviting proposals. No contract or purchase shall be subdivided to avoid the requirements of this section. All sales of personal property which has become obsolete or unusable, when the estimated value shall exceed $10,000, shall be sold by formal written contract or at a public auction to the highest responsible bidder, after due notice inviting proposals and bidders.
(1995 Code, § 1-5052) (Ord. passed 6-7-1983)